Slotted screwdrivers

All you need is two pieces of pipe, a coupling, a rubber band, some wire, and a thin metal rod. Assemble everything as In the diagram The firing pin should be filed on one end. It should look like a straight-slot screwdriver. The firing pin Is used to both fire the, 22 and to poke out the fired shelL c... 

Combining Tools We use different hand tools during combining processes. We use screwdrivers to install and remove screws. Screwdrivers have tips that match the type of screw on which they are used. We use slotted screwdrivers on slotted-head screws and the Phillips screwdriver on Phillips head screws. Some screws have square drives, hex drives, or torx drives. Figure 8-19 shows various types of screwdrivers. It is important to select the appropriate size and type of screwdriver when installing or removing a screw. 

Screwdriver used to tighten and loosen screws and bolts slotted head (single groove or slot), Phillips head (two grooves or slots crossing at 90°)... 

Cut a screwdriver slot In the front end of the barrel extension and join the barrel and extension with a 5/8- long bushlog-VID, 7/8-... 

There are two types of screw slot the straight slot and the cross slot, i.e. pozidriv or supadriv . Always select the screwdriver to suit the size of screw head and the type of slot - use of the incorrect size or type results in damage to both the screwdriver blade and the screw head and in a screw very difficult to loosen or tighten. Cross-slot sizes are numbered 1, 2, 3 and 4, and screwdrivers are available with corresponding point sizes to suit pozidriv and supadriv slots. 

Straight slots in screws are machined with parallel sides. It is essential that any screwdriver used in such a slot has the sides of the blade parallel to slightly tapered up to about 10 , Fig. 2.16(a). A screwdriver sharpened to a point like a chisel will not locate correctly and will require great force to keep it in the slot. Fig. 2.16(b). Various blade lengths are available with corresponding width and thickness to suit the screw size. 

PhilUps-head screw (Henry M. Phillips) The Phillips-head screw has an X-shaped slot in the head and can withstand the torque of a machine-driven screwdriver, which is greater than the torque that can he withstood by the conventional screw. 

Replacing fuses. If you need to replace a fuse, turn off the main power (not just a single breaker) in the circuit breaker box. This is important Remove the faceplate from the box typically you ll have to remove a few screws that hold the face in place. Each breaker should have two wires connected to it, one bringing electricity into the breaker and one leading out. Loosen the screws that hold these wires and bend the wires out of the way. The circuit breaker itself should now pop from its slot with finger power or with the use of a screwdriver to pry the breaker loose. Pop the new breaker into place and connect the wires to their appropriate terminals. Screw the faceplate onto the breaker box and restart the power. 

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